If five triangles are constructed having sides of the lengths indicated below, the triangle that will NOT be a right angle is:
A. 5-12-13
B. 3-4-5
C. 8-15-17
D. 9-40-41
E. 12-15-18
If a triangle is a right triangle, then the squares of two sides will add up to the square o the hypotenuse.
122 = 144.152 = 225.182 = 324.
144 + 225 does not equal 324.